[gnome-text-editor] openpopover: show "No Recent Documents" if there are none

[Christian Hergert <chergert src gnome org>]

commit 0428ffb3003607025c6dd0cd02ba98fb47218aed
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jul 26 15:39:50 2021 -0700

    openpopover: show "No Recent Documents" if there are none
    
    Fixes #85

 src/editor-open-popover.c  | 30 ++++++++++++++++++++++++++++
 src/editor-open-popover.ui | 49 ++++++++++++++++++++++++++++++----------------
 2 files changed, 62 insertions(+), 17 deletions(-)
---
diff --git a/src/editor-open-popover.c b/src/editor-open-popover.c
index 9ee8023..d241120 100644
--- a/src/editor-open-popover.c
+++ b/src/editor-open-popover.c
@@ -37,6 +37,9 @@ struct _EditorOpenPopover
   GtkListView    *list_view;
   GtkWidget      *box;
   GtkSearchEntry *search_entry;
+  GtkStack       *stack;
+  GtkWidget      *empty;
+  GtkWidget      *recent;
 };
 
 G_DEFINE_TYPE (EditorOpenPopover, editor_open_popover, GTK_TYPE_POPOVER)
@@ -284,8 +287,11 @@ editor_open_popover_class_init (EditorOpenPopoverClass *klass)
 
   gtk_widget_class_set_template_from_resource (widget_class, 
"/org/gnome/TextEditor/ui/editor-open-popover.ui");
   gtk_widget_class_bind_template_child (widget_class, EditorOpenPopover, box);
+  gtk_widget_class_bind_template_child (widget_class, EditorOpenPopover, empty);
   gtk_widget_class_bind_template_child (widget_class, EditorOpenPopover, search_entry);
   gtk_widget_class_bind_template_child (widget_class, EditorOpenPopover, list_view);
+  gtk_widget_class_bind_template_child (widget_class, EditorOpenPopover, recent);
+  gtk_widget_class_bind_template_child (widget_class, EditorOpenPopover, stack);
   gtk_widget_class_bind_template_callback (widget_class, on_list_item_bind_cb);
   gtk_widget_class_bind_template_callback (widget_class, on_list_item_unbind_cb);
   gtk_widget_class_bind_template_callback (widget_class, on_list_view_activate_cb);
@@ -305,6 +311,22 @@ _editor_open_popover_get_model (EditorOpenPopover *self)
   return self->model;
 }
 
+static void
+editor_open_popover_items_changed_cb (EditorOpenPopover *self,
+                                      guint              position,
+                                      guint              removed,
+                                      guint              added,
+                                      GListModel        *model)
+{
+  g_assert (EDITOR_IS_OPEN_POPOVER (self));
+  g_assert (G_IS_LIST_MODEL (model));
+
+  if (added || g_list_model_get_n_items (model))
+    gtk_stack_set_visible_child (self->stack, self->recent);
+  else
+    gtk_stack_set_visible_child (self->stack, self->empty);
+}
+
 void
 _editor_open_popover_set_model (EditorOpenPopover *self,
                                 GListModel        *model)
@@ -318,8 +340,16 @@ _editor_open_popover_set_model (EditorOpenPopover *self,
 
       if (model != NULL)
         {
+          g_signal_connect_object (model,
+                                   "items-changed",
+                                   G_CALLBACK (editor_open_popover_items_changed_cb),
+                                   self,
+                                   G_CONNECT_SWAPPED);
+
           selection = gtk_single_selection_new (g_object_ref (model));
           gtk_single_selection_set_autoselect (selection, FALSE);
+
+          editor_open_popover_items_changed_cb (self, 0, 0, 0, model);
         }
 
       gtk_list_view_set_model (self->list_view, GTK_SELECTION_MODEL (selection));
diff --git a/src/editor-open-popover.ui b/src/editor-open-popover.ui
index 38cf1a1..8cb852c 100644
--- a/src/editor-open-popover.ui
+++ b/src/editor-open-popover.ui
@@ -36,25 +36,40 @@
         <child>
           <object class="GtkFrame">
             <child>
-              <object class="GtkScrolledWindow">
-                <property name="hexpand">True</property>
-                <property name="hscrollbar-policy">never</property>
-                <property name="max-content-height">600</property>
-                <property name="max-content-width">500</property>
-                <property name="propagate-natural-height">True</property>
-                <property name="propagate-natural-width">True</property>
-                <property name="vexpand">True</property>
+              <object class="GtkStack" id="stack">
+                <property name="vhomogeneous">false</property>
+                <property name="hhomogeneous">false</property>
                 <child>
-                  <object class="GtkListView" id="list_view">
-                    <signal name="activate" handler="on_list_view_activate_cb" swapped="true" 
object="EditorOpenPopover"/>
-                    <property name="orientation">vertical</property>
-                    <property name="single-click-activate">True</property>
-                    <property name="factory">
-                      <object class="GtkSignalListItemFactory">
-                        <signal name="bind" handler="on_list_item_bind_cb" swapped="true" 
object="EditorOpenPopover"/>
-                        <signal name="unbind" handler="on_list_item_unbind_cb" swapped="true" 
object="EditorOpenPopover"/>
+                  <object class="GtkLabel" id="empty">
+                    <property name="label" translatable="yes">No Recent Documents</property>
+                    <property name="margin-start">6</property>
+                    <property name="margin-top">12</property>
+                    <property name="margin-bottom">12</property>
+                    <property name="margin-end">6</property>
+                  </object>
+                </child>
+                <child>
+                  <object class="GtkScrolledWindow" id="recent">
+                    <property name="hexpand">True</property>
+                    <property name="hscrollbar-policy">never</property>
+                    <property name="max-content-height">600</property>
+                    <property name="max-content-width">500</property>
+                    <property name="propagate-natural-height">True</property>
+                    <property name="propagate-natural-width">True</property>
+                    <property name="vexpand">True</property>
+                    <child>
+                      <object class="GtkListView" id="list_view">
+                        <signal name="activate" handler="on_list_view_activate_cb" swapped="true" 
object="EditorOpenPopover"/>
+                        <property name="orientation">vertical</property>
+                        <property name="single-click-activate">True</property>
+                        <property name="factory">
+                          <object class="GtkSignalListItemFactory">
+                            <signal name="bind" handler="on_list_item_bind_cb" swapped="true" 
object="EditorOpenPopover"/>
+                            <signal name="unbind" handler="on_list_item_unbind_cb" swapped="true" 
object="EditorOpenPopover"/>
+                          </object>
+                        </property>
                       </object>
-                    </property>
+                    </child>
                   </object>
                 </child>
               </object>